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US 5,710,217 AGranted
Extrudable thermoplastic hydrocarbon compositions
AssigneeMinnesota Mining and Manufacturing Company
InventorsThomas J. Blong, Michael P. Greuel, Claude Lavallee
Life of this patent
Estimating the term…
Abstract
This invention provides a melt-processable composition comprising, in admixture: (1) one or more melt-processable thermoplastic hydrocarbon polymers as the major component of the composition by weight, and, as a minor component of the composition by weight, (2) an effective amount of a chemically-resistant, fluoropolymer process aid to improve the processability of the composition. The fluoropolymer process aid contains at least about 50 weight percent of fluorine and comprises one or more fluoropolymers which are essentially completely ethylenically saturated.
Claims19
A chemically resistant, melt-processable composition comprising a blend of:
- (1) one or more melt-processable thermoplastic hydrocarbon polymers;
- (2) an amount effective to improve the processability of the composition of one or more chemically-resistant fluoropolymers comprising interpolymerized units of:
- (a) one or more fluorinated olefin monomers of the general formula:
- CF.sub.2 .dbd.CXR.sup.1
- wherein:
- X is a hydrogen or a halogen atom;
- and
- R.sup.1 is a halogen atom or is an alkyl, cyclic alkyl, or aryl group having from 1 to 10 carbon atoms;
- such alkyl or aryl groups may optionally be halogenated and may contain one or more heteroatoms and may be partially-, fully-, or non-halogenated provided, however, that when X is a hydrogen atom R.sup.1 contains an allylic carbon atom relative to the .alpha.-unsaturation and that allylic carbon atom is not perfluorinated;
- and
- (b) one or more olefin monomers of the general formula:
- CH.sub.2 .dbd.CXR.sup.2
- wherein:
- X is a hydrogen or a halogen atom;
- and
- R.sup.2 is a hydrogen or is a halogen atom with the proviso that R.sup.2 and X are not both fluorine;
- R.sup.2 may also be an alkyl, cyclic alkyl, or aryl group having from 1 to 10 carbon atoms any of which may optionally be partially-, fully-, or non-halogenated and may contain one or more heteroatoms;
- wherein the fluoropolymer or fluoropolymers constituting component (2) have a Carreau-Yasuda Equation m1 parameter of about 0.7 or less and wherein the ratio of the melt viscosity of the fluoropolymer or fluoropolymers constituting component (2) to the melt viscosity of the thermoplastic hydrocarbon polymer or polymers constituting component (1) is between 0.01 and 100 at the melt processing conditions of the composition.
15 more elements
A chemically resistant, melt-processable composition comprising a blend of:
- (1) one or more melt-processable thermoplastic hydrocarbon polymers;
- (2) an amount effective to improve the processability of the composition of one or more chemically-resistant fluoropolymers comprising interpolymerized units of:
- (a) one or more fluorinated olefin monomers of the general formula:
- CF.sub.2 .dbd.CXR.sup.1
- wherein:
- X is a hydrogen or a halogen atom;
- and
- R.sup.1 is a halogen atom or is an alkyl, cyclic alkyl, or aryl group having from 1 to 10 carbon atoms;
- such alkyl or aryl groups may optionally be halogenated and may contain one or more heteroatoms and may be partially-, fully-, or non-halogenated provided, however, that when X is a hydrogen atom R.sup.1 contains an allylic carbon atom relative to the .alpha.-unsaturation and that allylic carbon atom is not perfluorinated;
- and
- (b) one or more olefin monomers of the general formula:
- CH.sub.2 .dbd.CXR.sup.2
- wherein:
- X is a hydrogen or a halogen atom;
- and
- R.sup.2 is a hydrogen or is a halogen atom with the proviso that R.sup.2 and X are not both fluorine;
- R.sup.2 may also be an alkyl, cyclic alkyl, or aryl group having from 1 to 10 carbon atoms any of which may optionally be partially-, fully-, or non-halogenated and may contain one or more heteroatoms;
- wherein the fluoropolymer or fluoropolymers constituting component (2) have a polydispersity greater than or equal to 2.0 and wherein the ratio of the melt viscosity of the fluoropolymer or fluoropolymers constituting component (2) to the melt viscosity of the thermoplastic hydrocarbon polymer or polymers constituting component (1) is between 0.01 and 100 at the melt processing conditions of the composition.
15 more elements
A method of improving the extrusion characteristics of a melt-processable thermoplastic hydrocarbon polymer comprising blending:
- (1) one or more melt-processable thermoplastic hydrocarbon polymers;
- and
- (2) an amount effective to improve the processability of the composition of one or more chemically-resistant fluoropolymers comprising interpolymerized units of:
- (a) one or more fluorinated olefin monomers of the general formula:
- CF.sub.2 .dbd.CXR.sup.1
- wherein:
- X is a hydrogen or a halogen atom;
- and
- R.sup.1 is a halogen atom or is an alkyl, cyclic alkyl, or aryl group having from 1 to 10 carbon atoms;
- such alkyl or aryl groups may optionally be halogenated and may contain one or more heteroatoms and may be partially-, fully-, or non-halogenated provided, however, that when X is a hydrogen atom R.sup.1 contains an allylic carbon atom relative to the .alpha.-unsaturation and that allylic carbon atom is not perfluorinated;
- and
- (b) one or more olefin monomers of the general formula:
- CH.sub.2 .dbd.CXR.sup.2
- wherein:
- X is a hydrogen or a halogen atom;
- and
- R.sup.2 is a hydrogen or is a halogen atom with the proviso that R.sup.2 and X are not both fluorine;
- R.sup.2 may also be an alkyl, cyclic alkyl, or aryl group having from 1 to 10 carbon atoms any of which may optionally be partially-, fully-, or non-halogenated and may contain one or more heteroatoms;
- wherein the fluoropolymer or fluoropolymers constituting component (2) have a Carreau-Yasuda Equation m1 parameter of about 0.7 or less and wherein the ratio of the melt viscosity of the fluoropolymer or fluoropolymers constituting component (2) to the melt viscosity of the thermoplastic hydrocarbon polymer or polymers constituting component (1) is between 0.01 and 100 at the melt processing conditions of the composition, and extruding the blend.
16 more elements
Dependencies are inferred from the claim text.